Yet another mount issue.
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Yet another mount issue.
Once again, I have a mount issue. In fact, I have finally noticed a pattern with it.
Let me give you the rundown. I do an auto two star align, and I align to Polaris first. Then, I align to another star on the opposite side of the sky, in this case, Sirius. Once it aligns successfully, which it does do, I go to the Orion nebula as a test. After successfully going to the Orion nebula, I try going to a different object, like the Pleiades, or the Andromeda galaxy.
It does not go directly to these objects. In fact, it doesn’t get to them all the way. It is way off when it tries to go to other objects. I will do some math and tell you exactly how off it is.
I have actually noticed a pattern, which makes me believe that there is a glitch in the system of my mount.
For the past 2 to 3 years, this problem has arisen every year from January to April. In fact, this is the reason I missed seeing comet Leonard.
After April, the problem disappears.
This is a mystery now. Is there any idea what the problem is?
I will get back when I do the math to tell you exactly how many degrees off I am.
Jared.
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
I feel sheepish!
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Re: Yet another mount issue.
Try not to use Polaris as a alignment star. it can actually screw up alignments.
Its a Celestron mount thing unfortunately.
Have you ever set the backlash on this mount? It also adds issues with
The only culture I have is from yogurt
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Re: Yet another mount issue.
Try not to use Polaris as a alignment star. it can actually screw up alignments.Lady Fraktor wrote: ↑Fri Feb 10, 2023 5:17 am I assume this is the GT mount?
Try not to use Polaris as a alignment star. it can actually screw up alignments.
Its a Celestron mount thing unfortunately.
Have you ever set the backlash on this mount? It also adds issues with goto precision.
Its a Celestron mount thing unfortunately.
Not done that, but thanks for the heads up!
Tony.
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Re: Yet another mount issue.
Thanks for the advice, I appreciate it. I will try not to use Polaris in the future.
Regardless, I did get it to work last night by aligning to Sirius first, then Polaris. It was able to accurately go to every object I input.
Jared
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
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Re: Yet another mount issue.
I was under the impression that if you used a star that was “stationary“ like Polaris and another star, it would easily calculate where all the other stars are at. Was I mistaken?
Anyway, here’s something else I’m going to add. Is the exact rundown of last night, when I was able to get it to work.
Got the telescope out side. I plugged it in. I selected auto two star align. I set the exact time and date. I aligned to Sirius first. I selected Polaris as the second star. The Telescope moved to Polaris. It did not point to Polaris exactly. I adjusted the telescope using the controller to center and align Polaris. After aligning Polaris, I did a test of the
The only thing I did differently between the night that it did not work, and the night that it did work, was that I auto two star aligned to Sirius first, then I aligned to Polaris. The night it did not work, I aligned in a different order. Polaris first, then Sirius.
When I tracked C2022 E3, I aligned to Dubhe and Polaris.
I just now noticed some thing.
I don’t know why, but all those other nights in 2021-2022, when I aligned to other stars, not including Polaris, it did not work January to April. Now, it’s working just fine. The only thing I’m doing differently is that I am auto two star aligning to Polaris and another star.
That’s all.
Jared
25mm plossl Eyepiece
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
My camera is able to take video, so I will take a video through the telescope and try to show you the problem. I will show you exactly how I am aligning, and I will see if I can replicate the problem.
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
With these Az/Alt mounts tracking is not active while centering aligning stars.
I will pick my alignment stars before starting so I can quickly go from west to east then up/ east (using up & right on approach)
The faster you can align the better the accuracy.
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Re: Yet another mount issue.
As a rule of thumb, I always choose my alignment stars as far apart as possible. Typically from NW and SE, or the
The bigger the separation between your alignment stars, the more accurate the calculation on the "sky model" IMO. The very first slew after the
Remember, always and I mean always, make your final slews to the alignment star RIGHT AND UP to get to the center of the
Hope these tips help.
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
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∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
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Re: Yet another mount issue.
The problem cropped up again tonight. I was able to take a detailed video of what happened.
Could you all please take some time and watch this video? It shows exactly what I am doing and what the problem is.
https://www.youtube.com/watch?v=wFJmXwBsTZg
Thanks again,
Jared
25mm plossl Eyepiece
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
Thing one, did we ever establish which Celestron
Thing 2, do you have a way of knowing the exact center of your camera's
Thing 3, your iPhone sensor is the equivalent of a 6mm
Thing 4, always make sure your first slew after a successful
Please let me know about these things.
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
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Re: Yet another mount issue.
First, I don’t know exactly what type of Celestron mount it is. I bought it off of eBay, and the seller never specified what type of mount it was.
Second, I don’t have a way of figuring out the exact center of the field of view. However, I can look into figuring that out. That could be part of the issue.
I thought I was pretty detailed in the video explaining what the problem was. Was I mistaken?
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
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Re: Yet another mount issue.
Polaris doesn't move enough.
Aligning on a target that moves a lot will give you very accurate information. A 1 arcminute error aligning to an object on the equator corresponds to an error of 1 arcminute of
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Re: Yet another mount issue.
They look like a SLT but does not have the on/ off switch.
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Re: Yet another mount issue.
25mm plossl Eyepiece
Goto mount
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"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
Alfred North Whitehead
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Re: Yet another mount issue.
Yes, you are mistaken.
What you gave us is visual accounting of what's going on, of which your alignment seems reasonable, you made it to 4 out of 5 targets. What we really need is a procedural accounting of what you are actually doing.
Next time, do your alignment with a 10-12mm
Lastly, do you know how to use the "sync" function of your mount?
If you do not have a reticle
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
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Re: Yet another mount issue.
I have to say right now, I feel very frustrated. I thought I was pretty detailed in the video. The fact that I was mistaken really frustrates me. I spent an hour last night trying to get the telescope to work, and in the last 10 minutes, that’s when I made the video. I was hoping it would help out, but apparently it didn’t.JayTee wrote: ↑Sun Feb 12, 2023 9:03 pmYes, you are mistaken.
What you gave us is visual accounting of what's going on, of which your alignment seems reasonable, you made it to 4 out of 5 targets. What we really need is a procedural accounting of what you are actually doing.
Next time, do your alignment with a 10-12mmEP . After a "successful" alignment put in your lowest powerEP to see if your intended object is thatFOV . If it is, you've done well.
Lastly, do you know how to use the "sync" function of your mount?
If you do not have a reticleEP in your arsenal, you should.
Maybe frustrated is an understatement, actually.
Keep in mind, I’m NOT frustrated at you, I’m just frustrated at the facts.
I need some time to cool down, if you know what I mean. I will post later.
Jared
25mm plossl Eyepiece
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Iphone 11 Nightcap app Camera
"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
Alfred North Whitehead
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Re: Yet another mount issue.
I completely understand! These
The reticle
Remember always using RIGHT AND UP as your final slew motions to your alignment star will help.
Those of us who have been doing this for a while know that on any given night, your slews with an entry-level
Sorry, you're going through this, but I guarantee you'll know the very best way to do a
∞ AP Scopes: #1: TPO 6" f/9 RC #2: ES 102 f/7 APO #3: ES 80mm f/6 APO
∞ G&G Scopes: #1: Meade 102mm f/7.8 #2: Bresser 102mm f/4.5
∞ Guide Scopes: 70 & 80mm fracs -- The El Cheapo Bros.
∞ Mounts: iOptron CEM70AG, SW EQ6R, Celestron AVX, SLT & GT (Alt-Az), Meade DS2000
∞ Cameras: #1: ZWO ASI294MC Pro #2: 662MC #3: 120MC, Canon T3i, Orion SSAG, WYZE Cam3
∞ Binos: 10X50,11X70,15X70, 25X100 ∞ AP Gear: ZWO EAF and mini EFW and the Optolong L-eXteme filter
∞ EPs: ES 2": 21mm 100° & 30mm 82° Pentax XW: 7, 10, 14, & 20mm 70°
Searching the skies since 1966. "I never met a scope I didn't want to keep."
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Re: Yet another mount issue.
It is also clear tonight. I am going to go out again, and this time, I AM going to make a video, but I will not upload it. I’m only doing this so I can vocally keep track of everything that I need to document until I can write it down. (It’s an ADHD thing.)
I’m going to use the same set up that I used last night (except for the focal reducer, which I hypothesize is making it more difficult to align,) and document everything that I do and notice.
I will do it with multiple alignment attempts.
@JayTee will this be sufficient? Is there anything I should add to what I should do?
Of course, I will take your advice that you’ve given me so far.
Jared
25mm plossl Eyepiece
Goto mount
Iphone 11 Nightcap app Camera
"Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of life is to grasp as much as we can out of that infinitude."
Alfred North Whitehead
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